Problems with decryption of the file, encrypted with $CALG_RC4

Hi!

Strange thing happens.
My script generates a result file, and then encrypts it with _Crypt_EncryptFile(), from Crypt.au3 UDF
If i decrypt it with _Crypt_DecryptFile i have no issues, and everything works fine.
But if i try to decrypt file with 3rd party tools i get garbage.

Any ideas?