I've been trying to do a glissando and it's been driving me crazy. I've read a lot of the adivce here, but it's still no good. The sliding of the fingers doesn't work for me at all, so I tried looking in to bending the pitch. This is where i'm stuck. I tried dropping my jaw while playing, but I can't get the note to go lower than a half-step. I also can't even get the note to go up any. Basically, I'm having trouble getting anything done. Is there something that I do with my tounge or throat that helps this? I would appreciate specific instructions, since all of the advice i've seen on other forums and such hasn't helped. I am just really clueless.

Any help at all would be appreciated.