I have just received a. I have just received a new computer and must now transfer all of my data

Question

I have just received a new computer and must now transfer all of my data stored on my Smartphone to this new computer. The settings in my Smart phone prohibit me from doing a full sync with my computer using activsyn. It says a relationship already exists with another computer. NO relationship exists with this computer -- and I can not find the way to delete the previous partnership ON MY PHONE. so I am stuck