Plugin help

I am having a problem getting Popsloader and the new music.prx to get along on my psp. I know that pops has a game text file and M33 3.90 music.prx has a vsh file. I have added the command line to each one to try and get them to both be functional in their own right. They show up in the plug in list in my recovery menu but i can never get them to work when they are supposed to when they are on the card at the same time. This is even if i turn off one in the recovery menu. Any help to get both going would be great. I have a psp phat with the latest m33 3.90. Thanks in advance.