Pushing Image to R90LE7

Pushing Image to R90LE7

We are having issues pushing a image to a R90LE7. I can send updates to the target machines without a problem, but we have 200 machines and want a standard image. I can pull without any errors but when I try to send the image to another machine I get a error message on the target machine. "Error while uploading MBR file" Error Stage "MBR Validation"
We are running WDM 5 And both Origin and destination machine are running HAgent 6.3.2.54. Merlin Boot Agent Version 3.1.2
These updates are also being done over a WAN and IIS appears to be all OK. We have played around with permissions and still no luck....
Any help???