Apache settings help please

[memorex]

Hi

i'm trying to make a little uploadscript with php , it works but only with small files (<2 MB) . I know that i have to adjust some settings in the php.ini file and i already did this. Then i read that i had to change a setting from apache called "LimitRequestBody" , now the problem is I cant find this setting anywhere, could somebody tell me where to find this setting , cause i'm losing my mind trying to find it.

thx