Blur @ 100% (homemade typographic logo)

hi,

Ive made a typographic logo in Illustrator. The logo is made out of rectangle’s. The problem comes when i resize the logo to a smaller size. When i do this the edges get a blurry.
But when i zoom in the al look clear and sharp.

The subtitles (the smaller one’s by rollover) are much more blurry then the large ones.
How can this problem be fixed?

Thanks in advance!!