Cannot download PDF more than 25MB in VuGen

Hi,

I'm trying to test memory use on server by opening large(60-120MB) PDF files, however VuGen doesn't allow me to download more than 25mb of PDF file opened. As result all smaller PDFs are downloaded fine, all larger are corrupt. 

I've tried to use web_submit_form():

web_submit_form("redirectViewCorrespondence_10", 
        "Snapshot=t18.inf", 
        ITEMDATA, 
        "Name=correspondenceRadios", "Value={heavyDoc5}", ENDITEM, 
        LAST);

and web_url()

    web_url("viewCorrespondence", 
        "URL={heavyDocUrl}", 
        "Resource=0", 
        "RecContentType=application/pdf", 
        "Referer={beforeheavyDocUrl}", 
        "Snapshot=t351.inf", 
        "Mode=HTTP", 
        LAST);

In both cases result is the same.

Is there any parameter which has to be changed to increase max size of downloaded pdf?

Thanks,

Victor