My passport can I use on 2 difrent OS one is win7 64 bit, other one is win7 32 bite

My passport can I use on 2 difrent OS one is win7 64 bit, other one is win7 32 bite. At first time I run on win7 64 bit but now I cant get access on other computer which is win7 32 bit. Please send me solution I dont want to loos my data which is on My Passport 250 GB.

You should be able to use the drive on 32 and 64 bit as long as the drive is formatted as NTFS.