[q] i cant open cwm

view story

http://forum.xda-developers.com – `i recently reverted my phone (nexus s 4g) to stock 4.0.4 so i could get the 4.1.1 update OTA i mange to install the root.zip file with the one-click-root program i used to use but after that when i place roms on my phone and try to install them via clockwork recovery i get an error screen (the android guy with a red triangle). it wont let me go into recovery at all the phone works fine besides that . also if i revert back to 4.0.4 stock i can root my phone and open recovery perfectly fine can anyone tell me what what my problem is ? and can someone tell me if its even possible to r (HowTos)