Can't mount EXT4 hard drive after mounting it in windows

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http://unix.stackexchange.com – I have a 2TB Western external HDD. Its original filesystem was NTFS but I formatted it to EXT4. I had no problem in Linux; But today after I mounted it using ext2fsd in a windows box, I cant mount it in linux anymore! The drive had no partition but after that windows mount Disk Utility Shows it has a 1KB partition and 2TB unallocated space!!! My Data are not corrupted (I still can view my files using ext2fsd in Windows!) Trying to mount using mount -t ext4 fails and dmesg says: EXT4-fs (sdb): VFS: Can't find ext4 filesystem also fsck gives: e2fsck 1.41.11 (14-Mar-2010) e2fsck: Bad ma (HowTos)