Which version of LennySH's ROM are you using? If you visit the link below you should see 3 files. I am running the large file 19213_3.exe and my WPA works fine. There is actually a 4th version which is downloaded automatically from the Kitchen's Updater. So if all you did was update through the updater then you have version 4. I know flashing can be a PITA but maybe you could download 19213_3.exe.
http://www.htcgeeks.com/Files/Apache/Basekits/19213/