vbcms section pagination - title metatag problem

[jsdk_racer]

I'd like to add page number to title tag in vbcms. Therefore i edited the template vbcms_page and add condition to <title>...</title> - <vb:if condition="$pagenumber > 1"> - {vb:rawphrase page_x, {vb:raw pagenumber}}</vb:if>.
But i cannot see any changes in title while jumping through pages 1, 2, 3, 4 etc.

Thanks in advance for any help...
Dominik