Did you switch to Ku band on your BUD receiver to power the LNB?
Also, not sure which switch you are using, I used a 22KHz switch. The instructions
HERE say to leave the LNB power "OFF", but if you are still having problems you might want to try it with the LNB power on. The DC block in the splitters from the LNBs should protect your analog rec. My setup only started working after I switched the LNB power "ON". Once I did this, the switch started working and would select between C and Ku band feeds, no problem.