[tryton] how to add a company logo to reports with company_logo Module

[kaheinzelmann0]

Hi, 

i am trying to add a company logo to the Reports for example in invoices.
I am using the spanish Module company_logo and add the image to the company 
settings in register 'Report' where you can also set the header and footer.
but on the reports the picture will not be displayed. 
Does anybody use this Module or is there a other way to add logos in 
reports? 

Thanks, Karl