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I am having problems connecting mission planner to my APM2.0 after I upgraded my PPM encoder. Trying to move up from ArduCopter V2.9.ib Hexa to V3.0.

Mission Planner 1.2.59 mav 1.0 APM2.0 3DR Radio Win7 computer with USB

http://copter.ardupilot.com/wiki/common-ppm-encoder-apm2x-atmega32u2/

is where I found how to upgrade the ATMEGA 32U2 PPM encoder. Upgraded PPM encoder, it said it was successful. Now when I plug in APM into USB port my it still shows up to select from but does not connect.

Example : After plugging in APM to USB port (3DR radio unplugged) I go into Mission Planner and select HARDWARE     The AMP2.0 board on the A B C LEDs only has steady on RED, no blue light, no yellow     TX is blinking fast     RX is blinking slow     Blue GPS led is steady ON. Then I select COM3 and 115200, then press Connect (blue and red lights do some blinking) Mission Planner shows Connect Failed When I look closer at why it shows

Object reference not set to an instance of an object.

at ArdupilotMega.MAVLink.OpenBg(Boolean getparams. ProgressWorkerEvent.Args progressWorkerEventArgs) in c:\Users\hog\Documents\Visual Studio 2010\Projects\ArdupilotMega\Mavlink\MAVLink.cs:line

483  

at ArdupilotMega.MAVLink.FmProgressReporterDoWorkAndParams(Object sender, ProgressWorkerEventArgs e.Object passdata)in c:\Users\hog\Documents\Visual Studio 2010\Projects\ArdupilotMega\ArdupilotMega\Mavlink\MAVLink.cs:line

311  

at ArdupilotMega.Controls.ProgressReporterDialogue.RunBackgroundOperation(Object o) in c:\User\hog\Documents\Visual Studio 2010\Projects\ArdupilotMega\ArdupilotMega\Controls\ProgressReporterDialogue.cs:line

77

I went to device manager > Control Panel > Device Manager It shows everything is OK. COM3 is set at 115200 8N1N , use FIFO is selected It says THIS DEVICE IS WORKING PROPERLY.

I went to let it upgrade the driver and it says it has the latest version.

Does anyone see were I went wrong.

Thanks Ray