LightIntBand.dbc lets WoW stop

[Cromon]

Hey!

Im trying to change values from LightIntBand.dbc in memory. It worked good for the Light.dbc but now ive got a problem. I use the following code to change the DBC according to LightIntBand.dbc - WoW.Dev Wiki

 [StructLayout(LayoutKind.Sequential)]
    internal struct LightIntBand
    {
        public uint ID;
        public uint NumEntries;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public uint[] TimeValues;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public int[] ColorValues;
    }

    public class Light
    {
        public static void ChangeLightColor(Color value)
        {
            byte[] tmp = new byte[4];
            for (uint i = 0; i < Utils.Statics.dbcIntBand.numRows; ++i)
            {
                EntryPoint.ReadProcessMemory(Process.GetCurrentProcess().Handle, new IntPtr(Statics.dbcIntBand.rowPointer.ToInt32() + i * 4), tmp, 4, IntPtr.Zero);
                IntPtr strucPtr = new IntPtr(BitConverter.ToInt32(tmp, 0));
                try
                {
                    LightIntBand ent = (LightIntBand)Marshal.PtrToStructure(strucPtr, typeof(LightIntBand));
                    if ((i % 18) == 2 || (i % 18) == 3 || (i % 18) == 4 || (i % 18) == 5 || (i % 18) == 6)
                    {
                        for (uint j = 0; j < 16 && j < ent.NumEntries; ++j)
                            ent.ColorValues[j] = (value.R >> 8 | (value.G >> 16) | (value.B >> 24) | (0x00));
                    }
                    Marshal.StructureToPtr(ent, strucPtr, false);
                }
                catch (Exception)
                {
                }
            }
        }
    }

The same code ive used to change Values in Light.dbc where it worked good and changed ingame. But here ive got a problem:
As soon as the code runs i get "WoW has stopped working". No exception, no crash or error, just the Windows JIT Debugger arguing, that WoW had an error.

Does anyone have a clue about this?

Greetings
Cromon