How to send packet in ROTMG ?

HI, i try send packet with WPE PRO but it always kick me from game. What i do wrong ? Can someone helm me ? Do someone know better packet editor ? Thanks!!!

Not sure but some packets seems to have timestamp or something like that. So you have to change them properly i belive.

They're encrypted, so you have to decrypt it. I have no clue how.

Yep they are encrypted with rc4. You can decryp them (packets from client) by using this key:
0x31,0x1F,0x80,0x69,0x14,0x51,0xC7,0x1B,0x09,0xA1, 0x3A,0x2A,0x6E with encryption algorythm.
0x72,0xC5,0x58,0x3C,0xAF,0xB6,0x81,0x89,0x95,0xCB, 0xD7,0x4B,0x80 from server.

also firts 5 bytes (4 bytes int32 - length, 1 byte - packet id) not encrypted.