cannot activesync or connect to internet when connected by usb

[tornadog]

I have a sprint touch with the custom 6.1 rom installed. It works great OTA. But when I connect to my pc using usb to charge it does not connect to the data network. I use activesync on my pc in guest mode. When I do a send/receive it says error synchronizing. When i open IE to browse it goes to my server proxy screen as we use ISA at work. After entering my proxy login I can get to browse but our ISA blocks most of the sites so I cannot get to many sites. Only way to browse or get my email is to disconnect from usb. Is there a fix for this? I tried Internet sharing which works for 2 minutes and then I get a remote something closed the connection!!!!