Enterprise library cache Manager Isolated storage accessed from multiple instance of same project

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C#

cache

I am working with winfrom application, for caching i have implemented Enterprise library caching. The definition of cache manager in app.config section is like this

<cachingConfiguration defaultCacheManager="Cache Manager">
<cacheManagers>
  <add expirationPollFrequencyInSeconds="60" maximumElementsInCacheBeforeScavenging="1000"
    numberToRemoveWhenScavenging="10" backingStoreName="Isolated Storage"
    name="Cache Manager" />
</cacheManagers>
<backingStores>
  <add partitionName="CachePartition" encryptionProviderName=""
    type="Microsoft.Practices.EnterpriseLibrary.Caching.BackingStoreImplementations.IsolatedStorageBackingStore, Microsoft.Practices.EnterpriseLibrary.Caching, Version=3.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
    name="Isolated Storage" />
</backingStores>

I am adding/removing contents from cached from code depending on multiple condition. Now when i try to run multiple instance of same project, during the execution I get the error " FileNotFoundException: Could not find file 'CachePartitionsdfsdfsdfsdf\1169009857\LA'."

What is the efficient way to handle cases when multiple instance of same project and caching ?

Thanks, Binaya