Grandcentral call forwarding and t-mobile

My blog buddy Jonathan posted a blog post of how to get your GSM phone to forward voicemail traffic over to GrandCentral. I’ve been longing for this feature for quite some time so the topic grabbed my interest.

My trouble is, I can’t get the GSM code which is *61*yournumber# , to work on my N95 with T-mobile. Has anyone been able to get GSM forwarding codes to work on t-mobile?

UPDATE: on the other blog post, some guy was able to do it with t-mobile. So now I think I’m being blacklisted. I have a FlexPay tmobile account, not sure if that has anything to do with it.