Radio calibration OK.
Witch parameters to check?
HK Arduino Mega V2.5,
UBLOX LEA-6H GPS Hk,
Bixler2
Manual, Stabilize, FBWA work well.
As soon as other mode are used, the throttle shut down.
The parameters file content follow.
Thank you. 
#NOTE: 2014-01-01 12:11:36 Plane: Bixler2
ACRO_LOCKING,0
ACRO_PITCH_RATE,180
ACRO_ROLL_RATE,180
AHRS_COMP_BETA,0.1
AHRS_GPS_DELAY,2
AHRS_GPS_GAIN,1
AHRS_GPS_MINSATS,6
AHRS_GPS_USE,1
AHRS_ORIENTATION,8
AHRS_RP_P,0.2
AHRS_TRIM_X,-0.046
AHRS_TRIM_Y,0.003
AHRS_TRIM_Z,0
AHRS_WIND_MAX,0
AHRS_YAW_P,0.2
ALT_CTRL_ALG,0
ALT_HOLD_FBWCM,0
ALT_HOLD_RTL,5000
ALT_MIX,1
ALT_OFFSET,0
ARSPD_AUTOCAL,0
ARSPD_ENABLE,0
ARSPD_FBW_MAX,22
ARSPD_FBW_MIN,12
ARSPD_OFFSET,156.336
ARSPD_PIN,0
ARSPD_RATIO,1.994
ARSPD_USE,1
AUTO_FBW_STEER,0
BATT_AMP_OFFSET,0
BATT_AMP_PERVOLT,17
BATT_CAPACITY,2200
BATT_CURR_PIN,2
BATT_MONITOR,4
BATT_VOLT_MULT,10.1
BATT_VOLT_PIN,1
CAM_DURATION,10
CAM_SERVO_OFF,1100
CAM_SERVO_ON,1300
CAM_TRIGG_DIST,0
CAM_TRIGG_TYPE,0
CMD_INDEX,0
CMD_TOTAL,0
COMPASS_AUTODEC,1
COMPASS_DEC,0.244
COMPASS_EXTERNAL,0
COMPASS_LEARN,1
COMPASS_MOT_X,0
COMPASS_MOT_Y,0
COMPASS_MOT_Z,0
COMPASS_MOTCT,0
COMPASS_OFS_X,0
COMPASS_OFS_Y,0
COMPASS_OFS_Z,0
COMPASS_ORIENT,0
COMPASS_USE,1
ELEVON_CH1_REV,0
ELEVON_CH2_REV,0
ELEVON_MIXING,0
ELEVON_OUTPUT,0
ELEVON_REVERSE,0
FBWB_CLIMB_RATE,2
FBWB_ELEV_REV,0
FENCE_ACTION,0
FENCE_CHANNEL,0
FENCE_MAXALT,0
FENCE_MINALT,0
FENCE_TOTAL,0
FLAP_1_PERCNT,0
FLAP_1_SPEED,0
FLAP_2_PERCNT,0
FLAP_2_SPEED,0
FLTMODE_CH,8
FLTMODE1,11
FLTMODE2,12
FLTMODE3,5
FLTMODE4,6
FLTMODE5,2
FLTMODE6,0
FORMAT_VERSION,13
FS_BATT_MAH,0
FS_BATT_VOLTAGE,0
FS_GCS_ENABL,0
FS_LONG_ACTN,1
FS_LONG_TIMEOUT,20
FS_SHORT_ACTN,1
FS_SHORT_TIMEOUT,1.5
GND_ABS_PRESS,102449.9
GND_ALT_OFFSET,0
GND_TEMP,23.433
GROUND_STEER_ALT,0
GROUND_STEER_DPS,90
INS_ACCOFFS_X,-0.103
INS_ACCOFFS_Y,-0.198
INS_ACCOFFS_Z,-0.478
INS_ACCSCAL_X,1.001
INS_ACCSCAL_Y,1.005
INS_ACCSCAL_Z,0.993
INS_GYROFFS_X,-0.007
INS_GYROFFS_Y,0.024
INS_GYROFFS_Z,-0.003
INS_MPU6K_FILTER,0
INS_PRODUCT_ID,88
INVERTEDFLT_CH,0
KFF_RDDRMIX,0.5
KFF_THR2PTCH,0
LAND_FLARE_ALT,3
LAND_FLARE_SEC,2
LAND_PITCH_CD,0
LEVEL_ROLL_LIMIT,5
LIM_PITCH_MAX,1500
LIM_PITCH_MIN,-2500
LIM_ROLL_CD,4500
LOG_BITMASK,334
MAG_ENABLE,1
MIN_GNDSPD_CM,0
MIXING_GAIN,0.5
MNT_ANGMAX_PAN,4500
MNT_ANGMAX_ROL,4500
MNT_ANGMAX_TIL,4500
MNT_ANGMIN_PAN,-4500
MNT_ANGMIN_ROL,-4500
MNT_ANGMIN_TIL,-4500
MNT_CONTROL_X,0
MNT_CONTROL_Y,0
MNT_CONTROL_Z,0
MNT_JSTICK_SPD,0
MNT_MODE,0
MNT_NEUTRAL_X,0
MNT_NEUTRAL_Y,0
MNT_NEUTRAL_Z,0
MNT_RC_IN_PAN,0
MNT_RC_IN_ROLL,0
MNT_RC_IN_TILT,0
MNT_RETRACT_X,0
MNT_RETRACT_Y,0
MNT_RETRACT_Z,0
MNT_STAB_PAN,0
MNT_STAB_ROLL,0
MNT_STAB_TILT,0
NAV_CONTROLLER,1
NAVL1_DAMPING,0.75
NAVL1_PERIOD,25
PTCH2SRV_D,0
PTCH2SRV_I,0
PTCH2SRV_IMAX,500
PTCH2SRV_P,1.2
PTCH2SRV_RLL,1
PTCH2SRV_RMAX_DN,0
PTCH2SRV_RMAX_UP,0
PTCH2SRV_TCONST,0.5
RALLY_LIMIT_KM,5
RALLY_TOTAL,0
RC1_DZ,30
RC1_MAX,1896
RC1_MIN,1097
RC1_REV,-1
RC1_TRIM,1496
RC10_DZ,0
RC10_FUNCTION,0
RC10_MAX,1900
RC10_MIN,1100
RC10_REV,1
RC10_TRIM,1500
RC11_DZ,0
RC11_FUNCTION,0
RC11_MAX,1900
RC11_MIN,1100
RC11_REV,1
RC11_TRIM,1500
RC2_DZ,30
RC2_MAX,1895
RC2_MIN,1100
RC2_REV,-1
RC2_TRIM,1492
RC3_DZ,3
RC3_MAX,1900
RC3_MIN,1091
RC3_REV,1
RC3_TRIM,1100
RC4_DZ,30
RC4_MAX,1891
RC4_MIN,1101
RC4_REV,-1
RC4_TRIM,1496
RC5_DZ,0
RC5_FUNCTION,0
RC5_MAX,965
RC5_MIN,962
RC5_REV,1
RC5_TRIM,1555
RC6_DZ,0
RC6_FUNCTION,0
RC6_MAX,1501
RC6_MIN,1500
RC6_REV,1
RC6_TRIM,1500
RC7_DZ,0
RC7_FUNCTION,0
RC7_MAX,1501
RC7_MIN,1500
RC7_REV,1
RC7_TRIM,1500
RC8_DZ,0
RC8_FUNCTION,0
RC8_MAX,2046
RC8_MIN,1101
RC8_REV,1
RC8_TRIM,1896
RCMAP_PITCH,2
RCMAP_ROLL,1
RCMAP_THROTTLE,3
RCMAP_YAW,4
RELAY_PIN,13
RLL2SRV_D,0
RLL2SRV_I,0
RLL2SRV_IMAX,500
RLL2SRV_P,0.8
RLL2SRV_RMAX,0
RLL2SRV_TCONST,0.5
RSSI_PIN,-1
RST_MISSION_CH,0
RST_SWITCH_CH,0
SCALING_SPEED,15
SCHED_DEBUG,0
SERIAL0_BAUD,115
SERIAL3_BAUD,57
SKIP_GYRO_CAL,0
SR0_EXT_STAT,2
SR0_EXTRA1,10
SR0_EXTRA2,10
SR0_EXTRA3,2
SR0_PARAMS,50
SR0_POSITION,3
SR0_RAW_CTRL,2
SR0_RAW_SENS,2
SR0_RC_CHAN,2
SR3_EXT_STAT,2
SR3_EXTRA1,2
SR3_EXTRA2,2
SR3_EXTRA3,2
SR3_PARAMS,0
SR3_POSITION,2
SR3_RAW_CTRL,2
SR3_RAW_SENS,2
SR3_RC_CHAN,2
STEER2SRV_D,0.005
STEER2SRV_I,0.2
STEER2SRV_IMAX,1500
STEER2SRV_MINSPD,1
STEER2SRV_P,1.8
STEER2SRV_TCONST,0.75
STICK_MIXING,1
SYS_NUM_RESETS,116
SYSID_MYGCS,255
SYSID_SW_TYPE,0
SYSID_THISMAV,1
TECS_CLMB_MAX,5
TECS_HGT_OMEGA,3
TECS_INTEG_GAIN,0.1
TECS_PTCH_DAMP,0
TECS_RLL2THR,10
TECS_SINK_MAX,5
TECS_SINK_MIN,2
TECS_SPD_OMEGA,2
TECS_SPDWEIGHT,1
TECS_THR_DAMP,0.5
TECS_TIME_CONST,5
TECS_VERT_ACC,7
TELEM_DELAY,0
THR_FAILSAFE,1
THR_FS_VALUE,950
THR_MAX,100
THR_MIN,20
THR_PASS_STAB,1
THR_SLEWRATE,30
THR_SUPP_MAN,0
THROTTLE_NUDGE,1
TKOFF_THR_DELAY,2
TKOFF_THR_MINACC,0
TKOFF_THR_MINSPD,0
TRIM_ARSPD_CM,1200
TRIM_AUTO,0
TRIM_PITCH_CD,0
TRIM_THROTTLE,50
VTAIL_OUTPUT,0
WP_LOITER_RAD,50
WP_MAX_RADIUS,0
WP_RADIUS,26
YAW2SRV_DAMP,0
YAW2SRV_IMAX,1500
YAW2SRV_INT,0
YAW2SRV_RLL,1
YAW2SRV_SLIP,0