Movie size (height) not correct

When using Vidomi with XviD-Codec to encode and try to watch the movie with BSPlayer, the height of the movie is not correct, it seems to be half of the real height.
When encoding with DivX, I don't have that Problem.
I tried to watch an other (older) film encoded with XviD-Codec, which I know was displayed in correct size. Now it is also played with the wrong height.
Just tried using the Vidomi Player, the height of the film is correct again.
Anybody knows why this is so ?

Sorry for my english, but I hope you know what I mean.

Thanks

[adicoto]

Try to press Alt+1, alt+2, alt+3. Notice any difference ?

[samuel4711]

Originally Posted by adicoto

Try to press Alt+1, alt+2, alt+3. Notice any difference ?

Thank you for your answer.

Unfortunately I did not notice any difference.

[adicoto]

No change in movie proportions ?

[samuel4711]

Originally Posted by adicoto

No change in movie proportions ?

When using shift+1,2,3 to change to 16:9 or 4:3, the proportion does change.
In 4:3 the size is quite o.k., but the quality is not good, because i can see blocks.