Doubt about robots.txt

[serenoo]

I noticed that google indexed
example.com/directory1/?MA
example.com/directory1/?MD
example.com/directory1/?NA
example.com/directory1/?ND

I do not allow parameteres on my /directory1/index.php and probably the fact I did allow directory listing could cause that. The pages are all the same.
I added
Disallow /directory1/?MA
Disallow /directory1/?MD
Disallow /directory1/?NA
Disallow /directory1/?ND

on my robots.txt and by webmaster google tool I removed them succesfully, but
/directory1/ is disapperead too. :(
My website is new.
I believed that Disallow /directory1/?MA do not remove /directory1/ from google. Is that last sentence correct?

[g1smd]

Yes, it is.

However, it will take a while for Google to add the URLs you do want in place of those that you do not.

If there are NO parameters at all, then this will be simpler code:

Disallow: /*?