[Konstantinos]

Hmm, weird. Debug your code and let's see the output.

pawn Код:

if(db_num_rows(Result) == 1)
{
    print("DEBUG: Rows found (Result)");
    db_get_field_assoc(Result, "ADMIN", Field, 30);
    PlayerInfo[playerid][Admin] = strval(Field);
    printf("DEBUG: Admin = %d", PlayerInfo[playerid][Admin]);
    // blabla..

and show us what does it print.