Wireless tether error

[Guest URPREY]

Just got a Nexus S a few days ago and activated it on T-Mobile.

Tried the wireless hotspot today, and it just says "error" when trying to turn on.

Anyone else encounter this issue?

I bought my device outright so I'm on a Flexpay Even More Plus acct with 500 min/unlimited message/unlimited web.

I've done some testing with both my AT&T and T-Mobile sims. The phone randomly gives errors regardless of which sim is in it so I don't think there is an issue with my T-Mo plan setup.

I also tried the wireless tether apk and still randomly get the errors.

Is this working consistently for anyone else?