Problem with EB and Paypal

Hello
User can fill the form then paypal pay,but no data on administrator, paypal IPN is enable,

so I pack my test site, and duplicate it to multi test-server environments, including our local ISP in Taiwan and Bluehost in the US.
Only successfully pay and book on Bluehost, but I just can't success on other environment including standalone centos 6.x server,
Is there any special PHP setting? or any module we have to enable? anyone have idea? TUAN?

Thank you very much

Hi

Maybe the reason is because on that server, there are some firewall softwares... block IPN messages from Paypal ? Do you have any way to check it ?

Tuan

I turn off firewall service in standalone centos 6.x server and test again ,it still did not work, when check paypal's IPN records ,every IPNs are all sent ,without retrying.
Attach file is the apache errorlog during the booking period,can you check for us?
EB version 1.4.4
thank you very much

error_log [attachment=1929]error_log.txt
[/attachment]

Could you please attach the file ipn_logs.txt which can be found in componnets/com_eventbooking folder ?

Tuan

Here's the logs, thank you tuan