Theres a new modded ps3lib which can log all the bytes your write and read. To get around this issue there are several things you can do. Add this code inside your Form Load event. Method 1: (Best Method) Check the MD5 Hash of the PS3Lib to make sure it matches either 2.50, or 2.60. Code: Code:try { byte[] M250 = new byte[] { 0x7B, 0xE3, 0xDB, 0x9B, 0x76, 0x08, 0xCB, 0x05, 0xCC, 0xF5, 0x6C, 0x5C, 0x60, 0x6E, 0xBD, 0x60 }; byte[] M260 = new byte[] { 0xF0, 0xE0, 0x4E, 0xFE, 0x7B, 0x2A, 0xA4, 0x77, 0x11, 0x53, 0x59, 0x15, 0xE2, 0xB1, 0xA1, 0xAB }; byte[] MD5Result; using (var md5 = MD5.Create()) { MD5Result = md5.ComputeHash(File.ReadAllBytes(Directory.GetCurrentDirectory() + @"\PS3Lib.dll")); string PsLib = ASCIIEncoding.ASCII.GetString(MD5Result); string PsLib250 = ASCIIEncoding.ASCII.GetString(M250); string PsLib260 = ASCIIEncoding.ASCII.GetString(M260); if (PsLib != PsLib250 && PsLib != PsLib260) { Application.Exit(); } } } catch { Application.Exit(); }Method 2: Check the file version (Modded Lib is 9.9.9.9) then automatically exit if it is not 4.3 or 4.4. I'll write something up for this soon, you can always add both in too