Unity3D IP Camera - unity3d

Question

I'm using a Marmitek IP RoboCam 641 to import a video feed into unity. I use constantly refreshing snapshots to update a GUI.DrawTexture on the screen. However I recently switched to the Marmitek from a Velleman wireless ip colour camera. Now my snapshot only refreshes once or twice, before stopping and giving this error:
UnityException: Recv failure: Connection was reset
SEMTEX+c__Iterator0.MoveNext () (at Assets/Scripts/SEMTEX.cs:37)
And this is my code:
using UnityEngine;
using System.Collections;
public class SEMTEX : MonoBehaviour {
//public string uri = "http://192.168.1.101/snapshot.cgi";//velleman
public string uri = "http://192.168.1.30/cgi/jpg/image.cgi";//marmitek
public string username = "admin";
public string password = "admin";
int calc = 0;
Texture2D cam;
Texture2D cam2;
public void Start() {
cam=new Texture2D(1, 1, TextureFormat.RGB24, true);
StartCoroutine(Fetch());
cam2=new Texture2D(1, 1, TextureFormat.RGB24, true);
StartCoroutine(Fetch());
}
public IEnumerator Fetch() {
while(true) {
Debug.Log("fetching... "+Time.realtimeSinceStartup);
WWWForm form = new WWWForm();
form.AddField("dummy", "field"); // required by WWWForm
WWW www = new WWW(uri, form.data, new System.Collections.Generic.Dictionary<string,string>() { // using www.headers is depreciated by some odd reason
{"Authorization", "Basic " + System.Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes(username+":"+password))}
});
yield return www;
if(!string.IsNullOrEmpty(www.error))
throw new UnityException(www.error);
www.LoadImageIntoTexture(cam);
www.LoadImageIntoTexture(cam2);
}
}
public void OnGUI() {
GUI.DrawTexture(new Rect(0,0,Screen.width/2,Screen.height), cam);
calc = (Screen.width/2-100);
GUI.DrawTexture(new Rect(calc,0,Screen.width/2,Screen.height), cam2);
Debug.Log (Screen.width);
}
Does anyone have any ideas regarding my error?