Somewhat Puzzled about TSAC

I have been trying to set this up for about a week now, and have had very little success. The issue pertains to Microsoft's implementation of TSAC, I have got the services up and running and can successfully use all of it's features within my lan,however when attempting to access my internal resources from an external source ie:my job,I can get to the logon prompt, enter my server credentials ie: server name, domian name etc. I get a vbscript error and bounced back to enter my credentials...if anyone has seen and/or resolved this issue please drop me a line as it would be greatly appriciated.

Thanks
Shannon