WSE 1.0 Multiple <passwordProvider> entries error causing me grie

[JustBitsNBytes]

Our company has been migrating from .Net 1.1 to the new version 2.0 and I've
noticed the following error which happens quite often and requires an IIS
reset to recover web serivce functionality.

We are using WSE 1.0 sp1 and the <passwordProvider> declaration is in the
web.config file located in the root folder for the web service in question.
I've searched and can't find the password provider in the machine.config or
file more global in scope.

Any clues would be much appreciated!

Here's the error:

System.Configuration.ConfigurationErrorsException: Multiple
<passwordProvider> entries were found in the configuration file, but only one
is allowed.
at System.Configuration.BaseConfigurationRecord.EvaluateOne(String[]
keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord,
SectionRecord sectionRecord, Object parentResult)
at System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord
factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean
getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject)
at
System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String
configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject,
Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String
configKey, Boolean getLkg, Boolean checkPermission)
at System.Configuration.BaseConfigurationRecord.GetSection(String
configKey)
at
System.Web.Configuration.HttpConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String configKey)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.ConfigurationSettings.GetConfig(String sectionName)
at
Microsoft.Web.Services.Configuration.WebServicesConfiguration.Initialize()
at Microsoft.Web.Services.Pipeline..ctor()
at
Microsoft.Web.Services.WebServicesExtension.BeforeDeserializeServer(SoapMessage message)

Thanks!