problems with shipping invoice

[Silla]

Hi guys.

I installed your plug-in virtual st42_download1.0.6 shipment x download

I tried to buy a mp3 with paypal (no sandbox) the transaction is successful but not send any mail

in order if I open the invoice or if I click "Update order status", I get this message:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 109 bytes) in /var/www/vhosts/namesite/httpdocs/libraries/joomla/language/language.php on line 792

why this error?

[Silla]

I resolved, my host has raised the memory_limit parameter to 64M
Thanks for your cooperation ...