sse asm question

I was playing around with some asm and was wondering. Why is it that when i use sse to manipulate data in parallel that it seems to accumulate errors that i otherwise dont get with my output?

>>10
u dont seem to have any idea what i am talking about.

That's because we are pathetic. And not telepathetic. Here's the deal, young boy: you wanna help, you gonna post some code. No code - no help. Got it? Now move along.