Technological frames, participants' assumptions about information technology (IT), and in particular about the usage of the technology for everyday cooperative work, are a relevant factor for IT related behavior. Incongruent technological frames are associated with problems during the application and use of a new IT in an organization. This paper presents a field study which applies a pre-post-design in a freight forwarding company. During face-to-face discussion the participating employees of the company negotiated agreements regarding the future usage of a new mobile technology system for every day cooperative work between dispatcher agents and truck drivers. To support the development of shared technological frames the moderation technique STWT (socio-technical walkthrough) was applied. The results describe the structural changes in technological frames, and show to what extent these were shared by the participants. Based on the results possibilities to improve support for the development of shared technological frames are discussed.