dual boot please help

I decided earlier today to dual boot xp and windows 7 on my pc, and now it won't load either os and it will sometimes boot only 7 and not even give me an option on which os to boot.
Please help me!!!!

P.s. I have a 250gb hard drive and I partition it to have 35 gigs for windows 7.

Did you encounter any problems when installing Win7? Is it safe to assume you already had XP installed before installing Win7?

Yes I have Xp and no I did not encounter any problems.
Thank you but I have already fixed it.

so, what did you do to resolve it?:cool:

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