showing blank screen while running .htacess file

[manishabhalerao]

Following is my file which perfectly work in xampp 1.7.7 but gives blank screen in xampp 1.8.3
plz provide any suggestion
RewriteEngine on
RewriteRule ^$ /abhi1/OutputLib.php$1
RewriteRule ^index.php(.*)$ /abhi1/OutputLib.php$1
RewriteRule ^(.*)/$ /abhi1/$1/OutputLib.php
RewriteRule ^(.*)/index.php(.*)$ /abhi1/$1/OutputLib.php$2