Image freezing suggests to me that your (new) internet service may not have enough bandwidth for the Slingbox to upload the signal adequately. If possible, put a computer on the same router network that your Slingbox is connected to -- either wireless or Ethernet would be OK. Then test the download and upload speeds for your 2 wire ISP at one of the many sites that offer free bandwidth testing. I typically use www.bandwidthplace.com or www.speakeasy.net/speedtest
To stream standard definition TV, you likely need at least 2 mbps UPLOAD speeds. For high definition TV streaming, you need at least 5 mbps UPLOAD speeds. If your speeds are less that these, I would first contact your ISP to have them check for problems in your service line.