BES Express 5.0.3 install on SBS2011 - SQL Express 2008 Error

Hi all,

Am running through setting up BES Express 5.0.3 on a newly install SB2011 server.

All the pre-checks went well, but it failed to install SQL Express 2005.

Looking through various help topics, it suggested using the install SQL Express 2008 R2.

I stopped the installation and uninstalled SQL Express 2005.

I then ran the CreateDB command in a Administrative command shell from the DES Database folder.

This failed, the error log has the following entry:

30000] (03/28 16:01:23.375):{0x2418} CBESDBInstaller::CBESDBInstaller - working directory is [C:\Data\BESX_5.0.3\BESX_Express_5.0.3\bundle0012\Database]
[30000] (03/28 16:01:23.547):{0x2418} Schema is being installed
[30000] (03/28 16:01:23.547):{0x2418} Scripts loading from: C:\Data\BESX_5.0.3\BESX_Express_5.0.3\bundle0012\Database\DBInstallScripts\SqlServer\
[30000] (03/28 16:01:23.547):{0x2418} Determining progress bar range
[30000] (03/28 16:01:41.617):{0x2418} ADO ConnectionTimeout value = 30s
[30000] (03/28 16:01:41.617):{0x2418} ADO ConnectionTimeout for re-initalizing the pool = 45s
[25137] (03/28 16:02:57.372):{0x2418} {ConnectionItem::ConnectToDB} Failed to connect.  Connection string is Provider=SQLOLEDB.1;Server=localhost;Database=master;Network=dbmssocn;Trusted_Connection=Yes
[25000] (03/28 16:02:57.372):{0x2418} ConnectionItem::ConnectToDB: COM Error 0x80004005 - Unspecified error - Source: "Microsoft OLE DB Provider for SQL Server" - Description "[DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied." - Command "ConnectionItem::ConnectToDB"
[20000] (03/28 16:02:57.372):{0x2418} [CBESDBInstaller::Connect] : Pool failed to initialize
====== END OF LOG ======

Not being a SQL person, I'm a bit stumped.
 I can't seem to be able to connect using SQL Management Studio either.