I don't know why I am having such trouble with this, but for some reason I can't keep the chord ringing out when I slide from the low b chord (2nd fret) to the high b chord (14th fret) in the beginning of Comfortably Numb. The chord dies out by the time I get to the 14th fret.

I have tried using a compressor pedal but it doesn't make that much of a difference. I am pushing fairly hard against the strings to try to make sure I don't mute them accidentally.

I'm not sure what I can do here.
Fender Strat
Epi Joe Pass Signature
Epi LP Plus Top
Jackson Dinky
Fender Hot Rod Deville 212
go slowly at the beginning of the slide, then when you get closer, speed it up so it works almost like a hammer-on. a little vibrato helps sustain too