[KotOR 2] Cannot go back Nar Shaddaa (HELP!!!!!)

[Obi Wan Pere 121]

I'm playing KotOR 2, 4 CD's 2.00.420 Spanish version with no MOD's installed and never saw this problem with my previous playthroughs. 

After completing Nar Shaddaa and GO TO's yacht I went and completed Dxun/Onderon. After that I travelled to Nar Shaddaa again but now, when I try to disembarck from the Ebon Hawk to the landing platform, the game stays "loading" and stops at 25/30%. Nothing else happens. I just can press CTRL - ALT - DEL (or ALT - TAB) and kill the game (in the Task Manager of Windows the game is still "working").

When I try again, in the saved files screen menu I can see that has been saved an Autosave (created once reached the platform). Trying to load this Autosave the problem persists, the load stops at 25/30% and again I have to kill KotOR 2. If I try with my own Save (landed in Nar Shaddaa but still inside the Ebon Hawk) when I disembarck the problem appears again. With this same Save I can take off and travel anyware, in fact I've completed Dantooine but when I travel back to Nar Shaddaa and try to disembarck the problem is there again. I believe all that is not critical for finish the game but is very, very annoying.

I don't think is related but I've tried all kind of combinations with the graphic options and nothing solved it. I think is related with the game fighting with its own bugs and something that I made in the "bad order" in Nar Shaddaa's plots.

I don't dare editing the Globals Numerics with KSE because there are a lot of things related with several quests that can be involved. If is required I can give you some more background (about the quests) and the values of the Global Numerics related with Nar Shaddaa from my last Save.

Please, HELP!!