Hard Disk Drive (HDD) not working on windows 7 after formatting it on Ubuntu ?

I formatted my Western Digital 500 Gb hard disk on Ubuntu 10.4 and now I want to use it on Windows 7 but it cannot detect it. I formatted it with FAT(applicable to all) option. I tried to Google this problem a bit and as suggested by one of the site i tried to format this drive with NTFS. Still windows cannot detect it. Drives in windows 7 is not a problem because I tried a different usb drive on it and it works. I can see the led of the drive glow when I connect it and I can also see remove drive safely option in lower right corner, but i cannot see any option in "my computer" to access the hard disk. Solution: I tried to format my HDD using "diskpart" utility available on widows7. It is working now. Just run "diskpart" on command-promt on diskpart select your HDD and run following commands: CLEAN CREATE PARTITION PRIMARY SELECT PARTITION 1 ACTIVE FORMAT FS=FAT32 QUICK ASSIGN EXIT