LG VX-6100

I uploaded contacts (289 of them) to my VX6100 using BitPim, and everything went fine except none of them are assigned to a group on the phone.

All of them do have a "categories" assignment in BitPim. Any ideas on how I can get them to uload to the phone with the group assignments intact?

I'm using BitPim 7.3, and the phone is running T61VZ02.

Thanks!