Is it all of the time or just right now? Maybe your ISP is running slow or maybe the website itself is having trouble. Hope all the bugs get worked out for ya!
I think my problem is similar but somewhat different. When I try to post sometimes after I type it and click submit reply button it says unregistered user. At that point I have a heck of a time getting through. If I type in my user name it says that name is already taken. Sometimes I just keep clicking till somehow I get it to work. Other times I just lose it. In my case I'm sure it's just operator troubles.