You will need to install Net Framework 2.0 to use EasyBCD 2.0 beta
in XP: Download details: .NET Framework Version 2.0 Redistributable Package (x86)
Remove any Windows 7 listing in Easy2.0, Add again on Add/Remove tab.
If Dual boot menu fails to appear, burn Windows 7 ISO to DVD using ImgBurn at 4x speed with Verify, boot into Repair console, click through to Startup Repair to run up to 3 separate times with reboots to rewrite the MBR to Windows 7 partition.
Now install EasyBCD 2.0 in Windows 7 and add XP, accept offered boot files.