SSIS pack to import multiple Excel files suddenly failing

Hi,

I have a created SSIS pack that imported multiple Excel files into an SQL Server 2005 table, while I have been away someone tried to make some changes to the pack and it no longer works.  The pack uses a
ForEach Loop to create a variable and set it to the path where all my files exist, this variable is then used in the ExcelFilePath Expression for the Excel connection to locate the files, when the package is run I just get errors that dont really make a lot of sense as I have said it originally worked and I have even put it back to importing just the one file and that works fine, it just wont import multiple files, it just has issues with the Excel Connection it just seems unable to find the files even though I browsed for the path using SSIS

TITLE: Package Validation Error
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Package Validation Error

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ADDITIONAL INFORMATION:

Error at Data Flow Task [Excel Source [5787]]: The AcquireConnection method
call to the connection manager "Excel Connection Manager" failed with error
code 0xC0202009.

Error at Data Flow Task [DTS.Pipeline]: component "Excel Source" (5787)
failed validation and returned error code 0xC020801C.

Error at Data Flow Task [DTS.Pipeline]: One or more component failed
validation.

Error at Data Flow Task: There were errors during task validation.

Error at Package [Connection manager "Excel Connection Manager"]: An OLE DB
error has occurred. Error code: 0x80004005.
An OLE DB record is available. Source: "Microsoft JET Database Engine"
Hresult: 0x80004005 Description: "Invalid argument.".

(Microsoft.DataTransformationServices.VsIntegration)

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BUTTONS:

OK
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Can anyone point out where I am going wrong?

Thanks