New Post: contact form Composite C1 2.1.1

I am using Composite C1 2.1.1
My contact form stopped working
i am getting these 2 errors:

6/17/2014 10:56 AM  

System.InvalidOperationException: 0 writeable data providers exists for data 'Composite.Community.ContactFormData'.
at Composite.Data.DataFacadeImpl.AddNew[T](IEnumerable1 datas, Boolean allowStoreCreation, Boolean suppressEventing, Boolean performForeignKeyIntegrityCheck, Boolean performeValidation, List1 writeableProviders)
at Composite.Data.DataFacadeImpl.AddNew[T](IEnumerable1 datas, Boolean allowStoreCreation, Boolean suppressEventing, Boolean performForeignKeyIntegrityCheck, Boolean performeValidation, List1 writeableProviders)
at Composite.Data.DataFacade.AddNew[T](IEnumerable1 collection, Boolean allowStoreCreation, Boolean suppressEventing, Boolean performForeignKeyIntegrityCheck, Boolean performeValidation, List1 writeableProviders)
at Composite.Data.DataFacade.AddNew[T](T data)
at Composite.Core.Implementation.DataConnectionImplementation.Add[TData](TData item)
at Composite.Data.DataConnection.Add[TData](TData item)
at Composite.Community.ContactForm.Functions.<Send>d__2.MoveNext() in c:\inetpub\vhosts\physiocare.co.il\httpdocs\App_Code\Composite\Community\ContactForm\Functions.cs:line 113
at Composite.Plugins.Functions.XslExtensionsProviders.StandardExtension.FunctionResultNodeIterator.MoveNext()
at System.Xml.XPath.XPathNodeIterator.Enumerator.MoveNext()
at System.Xml.Xsl.Runtime.XmlQueryRuntime.ChangeTypeXsltResult(XmlQueryType xmlType, Object value)
at System.Xml.Xsl.Runtime.XmlQueryRuntime.ChangeTypeXsltResult(XmlQueryType xmlType, Object value)
at System.Xml.Xsl.Runtime.XmlQueryContext.InvokeXsltLateBoundFunction(String name, String namespaceUri, IList`1[] args)
at <xsl:template match="/">(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Root(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Execute(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlSequenceWriter results)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter writer)
at Composite.Plugins.Functions.FunctionProviders.XsltBasedFunctionProvider.XsltBasedFunctionProvider.XsltXmlFunction.Execute(ParameterList parameters, FunctionContextContainer context)
at Composite.Functions.Foundation.PluginFacades.FunctionWrapper.Execute(ParameterList parameters, FunctionContextContainer context)
at Composite.Functions.FunctionRuntimeTreeNode.GetValue(FunctionContextContainer contextContainer)

PageRenderer | INNER    Error
6/17/2014 10:56 AM  

System.InvalidOperationException: Failed to get value for function 'Composite.Community.ContactForm'
at Composite.Functions.FunctionRuntimeTreeNode.GetValue(FunctionContextContainer contextContainer)
at Composite.Core.WebClient.Renderings.Page.PageRenderer.<>c__DisplayClass19.<ExecuteEmbeddedFunctions>b__15(Int32 i)

How can i fix this?
I tried to uninstall the package and reinstall it, but after uninstall i cant find it under available packages