Null Error when sending Invitation

[Netram Dhakar]

Hi 

I have install openmeeting version openmeetings_r3537.zip. On my centos server.

1. when I try to send and invitation from a meeting root. Then I get null error.

settings for the invitation are as follows:

email address - some valid email address

message: some message

password protected: uncheched

valid period endless

2. when I try to send and invitation from a meeting root. Then I didn't get any error. And Form submitted but i don''t get any mail

settings for the invitation are as follows:

email address - some valid email address

message: some message

password protected: uncheched

valid period: period

3. Now i have updated Openmeeting version to openmeetings_r4017.zip

But still I am getting same error

Please body can help me.

Thanks in Advance