Maintenance to ifile irule doesnt work

Not sure I understand the big picture that you are describing... So in data center SEA, you have some VIPs. When they go down, (meaning all the members of their pools are down? or when Internet user cannot access them?), then you redirect, via an iRule to a special maintenance page URL. This URL is hosted on a VIP in data center LHR, right? This latter VIP's job is to simply return some static content, via iFiles? you only question/problem is that the iRule is not returning the correct iFile content? Why is the iRule testing the URI? just return the content regardless of URI, no? Whenyou say it does not work, what does it mean? also, do you see any errors in the log when the requests are handled?