I have one of my domain controllers that when FRS begins replicating the Sysvol file I get NTFS event 55 corruption errors until the server locks up and needs re-booting. As soon as I take FRS back off line the errors stop. The two servers are in different location supplied by a wireless link, but all other filesharing and internet services work just fine. When I perfrom a CHKDSK it claims to have fixed corrupt issues and that all is fine. Then, bam, dozens of event 55 errors. Any ideas?