Re: Problems starting 6.1.0 and joining server.
How hard did you search? Might help if you were in the right place. (You're in the Tekkit SMP Bug Board, not Technic SSP.)
If you had searched there then you'd see that the latest build appears to be FUBAR. With Technic selected in your launcher hit Options > Manual Build Selection > 6.0.7|1.1|Rec. Build
You're launching Technic SSP in your client and not Tekkit SMP. (Current Version of Tekkit SMP is 2.1.0) So that problem is easy enough, launch TEKKIT, not TECHNIC.
Also with Tekkit selected in your launcher hit Options > Manual Build Selection > 2.1.0|1.1|Latest.
Should fix both of your problems.
Here's a handy little guide.