[imp] Problem of attachment

[edwardspl at ita.org.mo]

Dear All,

The System is Redhat Linux Fedora 1 ( without any Update ):

http://domain_name/horde/test.php :

Horde Versions

    Horde: 2.2.4
    IMP: 3.2.2 (run IMP tests)

PHP Version ( come with Fedora Core 1)

    View phpinfo() screen
    PHP Version: 4.3.3
    PHP Major Version: 4.3
    PHP Minor Version: 3
    PHP Version Classification: release
    You are running a supported version of PHP.

When I try to post Mail with attachment ( Size of Files more than 800KB
, < 800Kb is ok !), the Mail can't be sent, even the IMP can't be good
for work ( need to re-open the IE browser ), and there is no any error
messages...

Anyone can help ?

Thanks.

Edward.