mod_rewrite problem

Hi,

i got this mod_rewrite but it seems not to work correct

Code:
Options +FollowSymLinks

RewriteEngine On

RewriteRule ^([A-Za-z0-9-]+):([A-Za-z0-9-]+)/?$ index.php?$1=$2
[NC,QSA]
RewriteRule ^([A-Za-z0-9-]+):([A-Za-z0-9-]+)/([A-Za-z0-9-]+):([A-Za-
z0-9-]+)/?$ index.php?$1=$2&$3=$4 [NC,QSA,L]
RewriteRule ^([A-Za-z0-9-]+):([A-Za-z0-9-]+)/([A-Za-z0-9-]+):([A-Za-
z0-9-]+)/([A-Za-z0-9-]+):([A-Za-z0-9-]+)/?$ index.php?$1=$2&$3=$4&$5=
$6 [NC,QSA,L]
RewriteRule ^([A-Za-z0-9-]+):([A-Za-z0-9-]+)/([A-Za-z0-9-]+):([A-Za-
z0-9-]+)/([A-Za-z0-9-]+):([A-Za-z0-9-]+)/([A-Za-z0-9-]+):([A-Za-z0-9-]
+)/?$ index.php?$1=$2&$3=$4&$5=$6&$7=$8 [NC,QSA,L]


if i enter domain.com/test:1/

i get the right domain.com/index.php?test=1

if i enter domain.com/test:1/other:2/

i get domain.com/index.php?other=2 but the test:1 is missing.

only the last name:var is shown

maybe somebody can help me out there

thx