Exchange 2010 Create External Contacts -Import CSV

Ok so I created  CSV with 4 Fields.

ExternalEmailAddress
Name
Firstname
LastName

I entered in eahc users info into theose fields and saved the file ads a CSV to my root of : on exhcnage and called it VertedaExternals.CSV

I ran this cmd

Import-Csv .\VertedaExternal.csv| ForEach {New-MailContact -Name $_.Name -DisplayName $_.Name -ExternalEmailAd
dress $_.ExternalEmailAddress -FirstName $_.FirstName -LastName $_.LastName}

it errros with ALOT of stuff saying it

New-MailContact : Missing an argument for parameter 'ExternalEmailAddress'. Specify a parameter of type 'System.Object'
 and try again.
At line:1 char:111
+ Import-Csv .\VertedaExternal.csv| ForEach {New-MailContact -Name $_.Name -DisplayName $_.Name -ExternalEmailAd <<<<
    + CategoryInfo          : InvalidArgument: (:) [New-MailContact], ParameterBindingException
    + FullyQualifiedErrorId : MissingArgument,New-MailContact

The term 'dress' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spell
ing of the name, or if a path was included, verify that the path is correct and try again.
At line:2 char:6
+ dress <<<<  $_.ExternalEmailAddress -FirstName $_.FirstName -LastName $_.LastName}
    + CategoryInfo          : ObjectNotFound: (dress:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException



Here is an exmaple line of the csv

ExternalEmailAddress      Name      FirstName      LastName
user.last@verteda.com      User, Last      User       last