Streaming Login Problems

We have been working with Tech Support for 2 months with trying to resolve a login problem with Streaming. We login and get kicked out. We have cleared the Cache on the individual user machines, we have cleared our networks, we have prioritized everything, done the wildcards, we have done everything DES has asked but still random users cannot get in. Somewhere from the login with DES and the transfer to Streaming we get dropped. Has anyone else experienced login problems with Streaming? What steps have you taken to resolve it? If not what steps have you tried.Thanks,Searching for the needle in the haystack!