help phone keeps corrupting all pic and videos

hi im running a rooted 2.2 with a 32gb sandisk the first card i had would demount itself at random time and would delet my pic and video i took everytime and now this new one i thought was fine so now im pretty sure its the phone this card allows me to install most not all game onto the sd and save pics and take video just fine. BUT everytime i restart the phone my apps dont load everytime in the downloads and when they do the first half min or so it dont show them then it will bug up a little then show the apps that are on the sd but some apps get deleted eveytime with reboot like need for speed shift, and with every reboot all pics and vids wont load and say (warning can not play this contents) no matter what i do event if i copy them move to a diff dir or even the phone mem. does any one eles have this prob or im i the only one