To fix callRemote permission issue in 1.5:
1) Open server\mods\deathmatch\acl.xml in your favourite editor
2) Find the first occurrence of
3) Change false to true, so the line looks like this:
<right name="function.callRemote" access="true"></right>
4) Save acl.xml
And if we can fix the lighting system, you can then use 1.5
So please explain the exact problem with the lighting system.