Subscript out of range message

I'm new to ASP, and I need help with finding the values of the array. What I'm trying to do is have 5 lines for the users to enter in information of their sites, then if they need to add more sites, they can click a button to add another 5 lines keeping the 5 lines items they have already answered.  I keep getting this error:

Microsoft VBScript runtime (0x800A0009)
Subscript out of range: '[number: 0]'
On this line:
cCLcheck = arr_cCLcheck(x-1)

Here's my code....
 

<%
Dim z
z=5
%>

<%
Dim x, cCLcheck, cCPcheck, site_name, band_width
Dim arr_cCLcheck, arr_cCPcheck, arr_cSiteName
Dim arr_cBandWidth, z              

arr_cCLcheck = split(request.form("cCLcheck"), ", ")
arr_cCPcheck = split(request.form("cCPcheck"), ", ")
arr_cSiteName = split(request.form("site_name"), ", ")
arr_cBandWidth = split(request.form("band_width"), ", ")
                                             
For x = 1 to z
If (z > 6) And (x > 0 AND x <= (z-6)) Then
                                       
        cCLcheck = arr_cCLcheck(x-1)
        cCPcheck = arr_cCPcheck(x-1)
        site_name = arr_cSiteName(x-1)
        band_width = arr_cBandWidth(x-1)
                             
Else                                   cCLcheck = ""                         cCPcheck = ""
        site_name = ""
     band_width = ""
End If
%>
<tr>
<td><span style='font-size:10.0pt;font-family:Geneva, Arial, sans-serif'>
<INPUT type="checkbox" name="cCLcheck" value="ON"<%=checkedValue("cCLcheck")%>>CL
<br>
<INPUT type="checkbox" name="cCPcheck" value="ON"<%=checkedValue("cCPcheck")%>>CP
</span></td>
<td> <INPUT class=textfield type="text" name="site_name" value=<%=site_name%>></td>
<td> <INPUT class=textfield type="text" name="band_width" value=<%=band_width%>></td>
</td>
</tr>
<%
Next
%>
<tr>
<td colspan=5> <input class=textfield type="button" name="AddMore" value="Add More Sites" onClick="sendInfo(1);">
</td>
</tr>

Please help....