Works locally but 500 Error on remote machine - RewriteRule

[nav_it]

Greetings,

I'm relatively new to modifying .htaccess files. What I'm trying to do is use RewriteRule to clean up the URLs from query strings. Here's part of what I have:

RewriteEngine on

RewriteRule ^([_0-9a-z-\.]+)$ /$1/ [NC,R]
RewriteRule ^([_0-9a-z-\.]+)/$ index.php?v1=$1
RewriteRule ^([_0-9a-z-\.]+)/([_0-9a-z-\.]+)/$ index.php?$1=$2 [NC]
RewriteRule ^([_0-9a-z-\.]+)/([_0-9a-z-\.]+)/([_0-9a-z-\.\@]+)/$ index.php?v1=$1\&v2=$2\&v3=$3 [NC]
RewriteRule ^([_0-9a-z-\.]+)/([_0-9a-z-\.]+)/([_0-9a-z-\.\@]+)/([_0-9a-z-\.\@]+)/$ index.php?v1=$1\&v2=$2\&v3=$3\&v4=$4 [NC]

I also have the following conditions before each rule (leaving them all in would have been redundant for this purpose):
RewriteCond %{SCRIPT_FILENAME}!-f
RewriteCond %{SCRIPT_FILENAME}!-d

Now, this works on my local machine, Windows+Apache 2.0.55, but not on my hosting account, Linux+Apache 1.3.37. I get a "500 Internal Server Error". Does anyone see a problem with any of the above code?

Oh, and so you know, I'm escaping the '.' and '@' in the last couple of rules for a reason: I'm passing email addresses for those variables.

Any and all help/input is greatly appreciated.

[phranque]

just a stab in the dark here.
i noticed you don't have A-Z in the regexp - is there any chance there are upper case characters involved in the hosting machine urls?

[nav_it]

A bit of tinkering, and it works... My apologies for the waste of database space and time of those who took out time to read the post. In case anyone is having the same problem, the solution was to escape the '.' at the beginning of the set and to not escape the '@'.

Good eye, phranque, but the [NC] specifies that it is case-insensitive. Thanks for the effort.

[phranque]

right - didn't notice the NC