Thats exactly what it does. (post 15)
The domain mapping plugin in question is http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping
to give you an idea of where the problem is see this link
http://franchise.surecare.co.uk/issue
the first image shows the domain mapping plugin where it is now mapped to surecarefranchise.co.uk
the second image show how simple:press still uses the original permalink.
well must say it sounds like the plugin doesnt fully implement the wp api… by that I mean we just get that information from wp… permalink, site_url, home_url, etc
do you have a test setup (web reachable) that we could play with (would need wp/sp admin access as well as ftp access)? have a few ideas how to perhaps complete the circuit…
or if you are comfortable with hacking some code and using wp hooks, can give you few things to try… though no real clue if it will yield anything…
Interesting. Not sure how much assistance I can provide, since we only run forums on the primary site, not any subdomains. We also use a different domain mapping plugin: http://bit.ly/wpmsdomainmap
Based on your screenshots, however, my first step would be to update the SPF Integration permalink to the mapped domain. It looks like you currently have SPF permalink set to franchise.securecare.co.uk/forum but with the domain mapped to surecarefranchise.co.uk I’m not surprised SPF is having a hard time finding the right Forum page. Try updating your SPF permalink setting to surecarefranchise.co.uk/forum and see if that does the trick.
I’m not sure if it’s necessary, but you might need to update the WP permalink setting too, without making any changes.
Let us know if that helps!
thanks Jim… I suspect the domain mapping plugin they are using isnt pay close attention to the wp api, but could be wrong… looking at the plugin code, it doesnt seem to intercede if folks are grabbing urls or permalinks from wp… wp has hooks, so the plugin could jump in and correct… but dont really have a way to test…
Thanks I have updated the SPF permalink setting but it still retains the original franchise.surecare.co.uk/forum
How do I go about updating the WP permalink setting?
maybe I should just try the domain mapping plugin jim is using and see if that works!
you would update that on wp – settings – permalink… cant hurt, but not sure it will help…
The only option there is the permalink structure.
I set to default then back again and saved but no joy unfortunately.
would access to the cpanel help? incuding phpmyadmin..
I can private message you the login details if so 
will this be a live production site or a test setup? just tells me how crazy to get! 
thanks… see if I can figure anything out…
if you could add in a temp account to the site that has wp admin (for the network site) and sp admin caps (forum – admin – manage admins) that would help too…
okay, you are all set… wp ms, sp and domain mapping do all play together nicely… updating here for others…
the issue was in your setup…
1) the domain mapping plugin was not installed correctly
2) the ms domain setting should point to the mapped domain not the original
3) be careful with usage or www and not… they are two different cookie domains (ie logins) and wp ms doesnt really like www in the domain either…
let me know if you have any other issues…
RESOLVED
Thank you very much Mr Papa.
We can now see that Simple:press does integrate well with the Domain Mapping plugin for Multisite.
Thanks once again.