Slow and intermittent connections to a SonicWall Pro 300

Hi, First, thank you for creating this software. it was much needed. I wass able to get the tunnel open from OS X 10.2.6 MDD 867 over a DSL line to the SW 300 through a T1. Once the tunnel was open I was able to ping and connect to the local LAN without a problem. The 2 issues I was having is the tunnel going down very quickly, sometimes with traffic and sometimes with not. It was very intermittent but disintegrated quickly. One click of the vaporize button brought it right back up. The second issue was speed. Using Timbuktu I did a speed test without the tunnel and was getting a solid 115K-120K/sec. With the tunnel I was getting only around 4K/sec and it was bouncing all all over the place. It was very very slow. I would be glad to do more tests if I could get a little feedback. Please let me know what info you need from my configuration. I am basically using all the defaults in vapor on all tabs and on ID I am using address for local and remote. Both the local and the remote network are using NAT. This was tested on 2 different local networks on 2 different machines going to the same remote SonicWall. Thanks in advance for any help you can offer. Cheers, John.