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.