Facing problem to execute Append command on imap server

[arora]

Facing problem in Append Command. What mistake i did in Append command below, always return bad response
=============== =============== ===========
request: IMAP003 SELECT INBOX \r\n

response: * FLAGS (\Answered \Flagged \Draft \Deleted \Seen)

response: * OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen \*)]

response: * OK [UIDVALIDITY 3]

response: * 122 EXISTS

response: * 0 RECENT

response: * OK [UIDNEXT 2280]

response: IMAP003 OK [READ-WRITE] INBOX selected. (Success)

request:IMAP004 APPEND INBOX (\Seen) {2280} \r\n

reponse: + go ahead

request: From: mail@gmail.com
To: mail@gmail.com
Message-Id:<63414576000 0000000@abc.com >
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; CHARSET=US-ASCII

Hello

response: null or
response: there is some garbage value after message literal