Why would an offer not be credited?

I'd just like to start off by saying I apologize if I go overboard..I'm a bit frustrated right now..

anyway, I completed an offer for a trainn site and I got to the point of filing a missing credit request but its been almost a month now and still no credit. I tried another trainn site and did a different offer which was suppose to be instant but anyway, it has been nearly a week and I no credit thus far. Today, I cancelled my membership with the first offer I did and this is where I got really frustrated because I could see they had all my information, I even had a member number and everything so I knew I was signed up properly and did everything correctly. I'm currently waiting to see if anything happens with the the offer(partypoker) I did on the second trainn site. I played many real money hands, had my account verified and all that. So I knew that I signed up properly...

So back to my main question..what possible reason could these companies have for not crediting me? =/

and btw, the firt offer I mention is a canadian one..Reservation Rewards.

yea ive done offers for 2 sites, and just havent got credited, its pissin me off, one i had to pay the guy back and the second im completin another one, so some of it is just plain bullshit, stay away from earnfreegamingsystems and camera.freeproject.

Various things, what browser did you use?

Do you allow cookies, or popups?

Kind of internet do you have?

I used IE 6.0, cookies are allowed but I have the google toolbar which blocks popups... I have a broadband connection... and I have completed an offer with freeipods..the two sites that I cant seem to get credited for are yourfreeflatscreen and yourfreevideoipod

problem seems to be with Trainn..do they have any important popups that I may have missed?

Since I started using only IE 6.0, with no google toolbar, popups enabled, accepting all cookies, and clearing cookies before I do an offer, i've been credited within a day on all sites I've done.

Try submitting a customer service inquiry in addition to the missing credit request. That is what I did and they gave me credit a couple days later.

well they gave me credit for the first site I did..woot!