TomTom 7 is 100% compatible with the Vogue as I am running 7.915 which is the newest version ported from the Touch Pro.
I am not sure what the satus of your phone is but it has to be unlocked with coke 2.31 & should be running a custom ROM (NFSFAN's highly recommended). Without your phone being unlocked you probably will never get your GPS working. Follow the step in this thread. Basically to unlock your GPS your are going to have to flash a pre-gps ROM then flash back. Note, follow the instructions & only let the customizations run in those specific steps. Otherwise you will have to start all over.
http://forum.ppcgeeks.com/showthread...ght=unlock+gps
I have not followed the steps in this thread as my GPS has been working well before this thread was posted but people have had some success.