unreadable invoice attachments

unreadable invoice attachments

Hello,

beginning from December 09 I am not able to attach additional files to the invoice, when I send it by email to my costumer. The invoice itself arrives readable, but other files like .xls, .pdf, .jpg comes corrupted and with name "noname".

I use zoho Invoice since August 09 without this problem till mentioned December.

What do I wrong?

Regards, Lukas, CZ