At two weeks, I agree with AJ that it's more than likely diatoms. Completely normal and part of every tanks cycle. Just keep cleaning your glass and let it run its course... it'll be gone in 10-15days.
For the first 1-2 months just leave the tank alone as much as you possibly can. <u>Do not</u> add any chemicals, additives, etc as it will only take your tank longer to establish itself.