fel i strängar?

jag har nu mera problem med variabler och ifsatser som inte gör vad de ska...
problemet är att ifsatsen går till else även fast variablerna är exat likadana

[red]	response.write "oldF: <br>|" & oldF & "|<br>dbFiles: <br>|" & dbFiles & "|"
	if cstr ( oldF ) = cstr ( dbFiles ) then
		response.write _
			"Det finns inga nya l&aring;tar sedan ditt senaste bes&ouml;k<br>" & vbcrlf
	[blue][b]else[/b][/blue] 
		response.write "inte lika"
		arrFiles = split ( oldF, " " )
		for x = 0 to ubound ( arrFiles )
			addFile = dbFiles
			addFile = " " & replace ( addFile, " " & arrFiles ( x ) & " ", " " )

			dbFiles = addFile
		next

		addFile = trim ( addFile )
		arrFiles = split ( addFile, " " )
		response.write _
			"<table cellpadding = '0' cellspacing = '0' border = '0'>"
		for i = 0 to ubound ( arrFiles )
				set rs = con.execute ( " select dwn_file from dwn where dwn_id = "&arrFiles ( i )&" " )
				response.write _
					"<tr><td>*&nbsp;</td><td> <a href = 'files.asp?action=upone&id=" & arrFiles ( i ) &"'>" & replace ( rs ( "dwn_file" ), "_", " " ) & "</a><br><br></td></tr>"
		next
		response.write _
			"</table>"
	end if[/red]