Problem acessing my data on sata hard drive from my old laptop

crazyhorse2991[at]hotmail.co.uk

hi tried to access my sata hard drive and wont access my user content its from my acer aspire 5610 xp 64bit and ive tried 2 put all my data onto my new sata laptop hard drive in my new laptop but it wont boot if i use the xp hard drive or if i use a extrenal dock boots up the users folders but wont let me inside them any help my new laptop runs windows 7.