2
1) Do both servers have the same PHP version? Sometimes modules are not compatible with PHP5, which is causing blank screens
2) Therefore first install XOOPS (no modules), to make sure that it works.
3) Then add modules one by one, making sure that XOOPS is still working. For each module upload the corresponding tables form your DB Backup.
This way it wil be easier to find where is the problem. You can also turn on the debugger.