Site URL not working when redirected in AdminCP

[TJFweb]

Hi,

I'm currently setting up my vBulletin at a temporary preview URL on my new server at:

http://123.456.789.0/$sitepreview/domain.com/members/index.php (this is the preview URL generated by Plesk for those who are interested).

I haven't yet altered the DNS to point to my new server, which is why I am accessing the vBulletin installation via the preview site rather than via my domain.

The problem is that every time I save a change in the AdminCP (i.e. a template modification or settings change), I get redirected to http://domain.com/members/ rather than http://123.456.789.0/$sitepreview/domain.com/members/index.php

I have set all of my board URLs in vBulletin's settings to http://123.456.789.0/$sitepreview/domain.com/members/index.php

I think there may be a problem with there being a $ sign in the URL.

Does anyone have a workaround for this problem? This is making setting up my forum take at least twice as long as it should, especially when I'm trying to build a custom style.

Thanks!