Email account creation in plesk8.6 through API

Hi,

i am newbie to this forum and new in using plesk api.I need your support to go forward in implementing plesk details through API.
I am trying to generate email account for the domain.Here is the xml i am using for the same

<packet version="1.5.2.0">
<mail>
<create>
<filter>
<domain_id>domainid</domain_id>
<mailname>
<name>emailname</name>
<mailbox>
<enabled>true</enabled>
</mailbox>
<password>pass</password>
<password_type>crypt</password_type>
<permissions>
<cp_access>true</cp_access>
</permissions>
</mailname>
<mailname>
<name>techdept</name>
<mailbox>
<enabled>true</enabled>
</mailbox>
</mailname>
</filter>
</create>
</mail>
</packet>

By using this i am facing and error as 1014 Parser error: Request is invalid.
Can you people please help me to get rid of this issue.Its an urgent requirement for me.

Thanks in advance
Padmini