Cacti

I cannot see any graph with this version, I have do some action to fix it but unsuccesfull. I check in the technical support, it report as belowm may be it is reason ?, how to fix ? RRDTool Version Notice: Undefined index: Unknown in C:\Inetpub\wwwroot\cacti\utilities.php on line 268 ERROR: Installe...

This is my output command:

C:\AppServ\www\cacti>rrdtool.exe graph - \
ERROR: Could not make sense out of '\'
Can u help me

I have completed install for cacti, now I can creat a device on that. But after that, I dont see any information for this device and also I canot create a graph. Can anyone help me to complete configure