Xailer & OZ Software

Hi,
I have a understandig problem:
Hex( 243184193 ) returns the string "E7EB241" - this is correct
HexToDec(Hex( 243184193 )) returns the numeric value 243184193 - this is
correct too
but why
HexToString(HEX(243184193)) doesn't return the string "243184193"?
The Xailer-documentation says:
"Converts an hexadecimal format number (saved in a string) to decimal format
as a string."
Is this a bug in the function or in my brain?
Regards
Ingo