URL Rewriting is causing an error

[s3nzo]

Hey guys i'm trying to make "Pretty URL" using .htaccess now my problem is images and css aren't loading when i access the new url and the pages load really slow here's an example original url my6love | admin's | profile is working fine and the new address is my6love | admin's | profile how can i fix this?

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Thanks for reading i just figured the mistake i made now i fixed it i in .htaccess i had put

RewriteRule ^profile/([a-z0-9]+)/?$ user.php?nick=$1 [NC,L]

so people can visit mysite/profile/username now i changed the above code to

RewriteRule ^([a-z0-9]+)/?$ user.php?nick=$1 [NC,L]

so users can visit mysite/username and now it's working thanks for your time