The thing is, "restore clean install"
1) Doesn't mean you have to reinstall the game - look here:
http://forums.pocketplane.net/index.php?topic=175552) Doesn't mean you have to start anew - your old save game will work fine in 99% cases.
I'm sorry to say I don't know what the problem is. However, I searched on the forums and Bioware forum folks say that you must be sure you have the latest 26498 patch installed.
If it's the case and you did NOT install the patch, then, yes, I recommend you to do a full reinstall and apply the patch, or risk it and restore a clean (patched) install from the topic I linked you to above. Good luck!