Unhappy Need Help with Diag mode...

I have a kit rom and a 4.3 rom on the phone, and neither can go into diag mode using the ##3424# code from the dial pad. I believe I need diag mode to connect to program and I cant get it to come up. I am in debug mode already and have the htc abd drivers on my pc as well as java. all I need to do (I think) is get the phone into diag mode to access the program.

I hope someone can help me. its driving me crazy not being able to use this phone

Thanks guys.