I want to know which rule applies to the following situation

[cvetkovic]

i played cash game in poker.i have 2 pairs on flop.i go all in ,and pay me a single player.whan he call my all in, i take my cards to open at the dealer,besause we wait 4 and 5 card.but monitoring man for the game .told me that im doing fold with mu cards because i passed the line.he give all chips to the odher player.i think when im all in i can take my cards where i wont.i wont to know is any rule for this situation and who is wrong.HE or ME:) TNX IF SOMEONE HELLP MEEEE.