[Q] WiFi won't turn on after ROM change

I've recently installed and flashed SVHD 1.7 Android 4.1 Rom. Now my WiFi wont turn on! It says "turning on" and after a while it says "error" instead! Can someone help me? I did exactly as the instructions on the Rom page but still,no WiFi

I have a HTC Desire S
My kernel is 3.0.42 Fallout 1.0 Tiexiera. My radio/basebandversion is 20.76.30.035U_3831.19.00.110.
Do I need to update those or shall I do something else?

Please help me!