Metro PCS fast busy tone

[shpd87]

I am on Metro PCS $45 plan with a flashed touch pro 2 (verizon). I am running a Energy ROM (awsome!).

I used to be able recieve calls from my office to my cell but now I can't. Where I work we use a caller ID blocker that only shows the numbers "562" on caller ID when you call someone. Recently, when someone from work calls my cellhpone, all they hear is a fast busy signal and the call does not go through. I never see a caller ID and my phone never rings.

I called Metro and they resest my line of service, which did not solve the problem. The next time I called 611, the customer service agent said it was a problem with my handset....

Does anyone have any ideas how to solve this problem???? Thanks!