Software :: Eudora 6.2.4 With Leopard 10.5.8 - Attachment Errors

I have just upgraded to Leopard 10.5.8. And i get error with sending and getting mail with attachments: Message: Error while checking mail for 'my account': Couldn't create attachement to decode into 'docname' (-5000); An unknown error has occured {17535}

One or more attachements were corrupt. Message and/or attachemnts are probably corrupt.
Content-Type: multipart/mixed; boundary="============_-960829722==_============"
(This file must be converted with BinHex 4.0)and then the attachment is display inline as this:%&0XEfG[Af9eC'pbB5jRD@B!!!!!!!!!!!!!!!!!!cm!!!!![Ae(58Bi1@'G!"S
!X`!!mI(a68e0'4NCL)L)jZEQfGRCqIRj,5dYUDQT`m2$E@eY#3N*!$0Q-fDCrrr
r!!!!)IN%!!!!!!!X!!!!!*d!'J!!"2q`b8QV[6MVcE[rB%JaC'QHD+UZE1ZqF#c
2TQMIH+l['Zhr`+"`b1)CMmKNcX&X1Tr3U(4+V9U[f+afkh`m&Z#`H%`ZQmrSY(V--
other Message :[INDENT]
Error while checking mail for 'my account':
Couldn't create attachement to decode into 'docname' (-38); An fnOpnErr has occured {53:2891}

i have tried all the encoding method.