I have the same combination of GVP spectrum and A2632 in my A2500 with no problems at all. The 2632 has been extremely stable for me. As I remember, for certain configurations, the 2632 command has to be in the right place in the startup-sequence. I can take a look at where I've put the command in my startup file. I think there should be intructions about this in a file on the 2632 disk.