Switch to the code-view (XML) of the SSIS package. You will have to determine the ID of the two elements that the program is complaining about -- the two you are trying to connect, no graphic, but the program says it already has a connection. Mine looked like what you see below. Find yours and just delete those lines. Afterwards, you will be able to connect the two elements normally with the GUI.

<DTS:PrecedenceConstraint>

<DTS:Property DTS:Name="Value">0</DTS:Property>

<DTS:Property DTS:Name="EvalOp">2</DTS:Property>

<DTS:Property DTS:Name="LogicalAnd">-1</DTS:Property>

<DTS:Property DTS:Name="Expression"></DTS:Property><DTS:Executable IDREF="{9965A405-F348-40C8-8AA2-18B728B6F849}" DTS:IsFrom="-1"/><DTS:Executable IDREF="{ADC5C4ED-65AE-4DF1-A100-9703BA947663}" DTS:IsFrom="0"/>

<DTS:Property DTS:Name="ObjectName">Constraint</DTS:Property>

<DTS:Property DTS:Name="DTSID">{7D675726-A0B5-46DC-9442-422B3FAFCC29}</DTS:Property>

<DTS:Property DTS:Name="Description"></DTS:Property>

<DTS:Property DTS:Name="CreationName"></DTS:Property></DTS:PrecedenceConstraint>