Problem with accessing my Unitiserve via browser (Safari)

Ok..so I have an weird problem.

I have problem accessing my Unitiserve via Safari and Firefox on my Mac. It will work with Chrome on my Mac and it also works on my IE on my windows notebook. I tried updating my Flash on my Mac and even Java. But alas, the problem persists. 

Does anyone else has this problem and if so, what's the solution?