Mine does the same thing, except I can only get 25 cents in then it starts. Did exactly what everyone suggested about the nossel and different stations. Ricky D from Alabama has a nice post and I took his advice on how to change it and get into that area without dropping the tank, tank has to be dropped to get to the canister and valve. It's an easy job and the part is listed on his post.
I used the metal tape that A/C people use to tape duct work together, pretty sticky stuff, and worked great to replace the piece you have to remove. I also used a hacksaw blade to cut out the area. For me, it wasn't the valve. Weather is keeping me from looking into it more since I don't have a garage so,for now I just deal with it. Good luck and post what you find out.