[TYPO3] attacalendar problem after site moving

[A. Neves]

Hi,
 
I have transferred my typo3 installation to another server, using the export/import features.
 
My typo3 page uses the attacalendar extension, and that's wher I'm seeing this issue: the pictures that are uploaded to the server don't appear.
 
Checking the html code, you can see that the src, height, width, etc fields are blank. This doesn't add up because if you click the hyperlink associated to that empty image, a new window opens up and the picture appears there.
 <td class="td.tx-attacalendar-pi1_img" align="right"><a href="index.php?eID=tx_cms_showpic&amp;file=uploads%2Ftx_attacalendar%2Ftest.jpg&amp;bodyTag=%3Cbody%20style%3Dbackground-color%3A%23000000%3B%3E&amp;wrap=%3Ca%20href%3D%22javascript%3Aclose%28%29%3B%22%3E%7C%3C%2Fa%3E&amp;md5=03d3674c25601df4c47c72973b1e07d8" onclick="openPic('index.php?eID=tx_cms_showpic&file=uploads%2Ftx_attacalendar%2Ftest.jpg&bodyTag=%3Cbody%20style%3Dbackground-color%3A%23000000%3B%3E&wrap=%3Ca%20href%3D%22javascript%3Aclose%28%29%3B%22%3E%7C%3C%2Fa%3E&md5=03d3674c25601df4c47c72973b1e07d8','fa96128ef92167c7badf46d1fd8c7cf7','width=122,height=112,status=0,menubar=0'); return false;" target="thePicture"><img src="" alt="" title="" border="0" height="" width=""></a></td> Help? Thanks ;)