answer machine on manual mode not hangup call?

[DowNetworks]

when i got answering machine on the call using manual mode sometimes i hit hangup and clasific my call but the answering machine is still on the line so the call don't hangup even if i have another lead ready to dial.

any idea ??

[mflorell]

Asterisk version?

astguiclient version?

loadavg on the server when the problem happens?

[DowNetworks]

asterisk version = 1.2.24 I686

astg = 2.0.95

don't have load avg ...