Me and my partner have been trying for a baby for quite some time but are not having any luck is there some think that I could be doing wrong maybe some one could help and give me some use full information maybe tell me what I should do and what should not be done your answer would be very useful.

How long have you been trying? It takes the average couple up to a year of actively trying to become pregnant. Why? The stress that comes along with getting your hopes up only to be squashed each month can actually deter pregnancy.

Start taking prenatal vitamins now if you aren't already and have sex every other day rather than every day.

As J9 said, it may take awhile.

I would visit your doctor, if you haven't already, and let them know you are trying to get pregnant. They will do a pre-pregnancy workup that should include blood work to make sure your hormones are at the right levels to achieve pregnancy.

You need to narrow down your window of fertility. Here is a link in which you can determine when you are most likely you ovulate.
American Pregnancy Association : Getting Pregnant: Ovulation Calendar

During this time, do as J9 said and have sex every other day.

If in a year, you still haven't fallen pregnant, your doctor may be ready to step in.

Good luck :)