[selenium-users] Unable to drag and drop for the below scenario

[sree]

This is one of interview question. I have tried drag and drop using action
class, but not works here. Can you try and give the solution for steps 6
and 7 in the attached document.

Entire information is available in attached document.

i have tried with the below code for step 6 and 7:
Actions act=new Actions(driver);
act.dragAndDrop(welSendSMS,welTab).build().perform();
act.dragAndDrop(welSyncreceptor,welSyncnode).build().perform();


locators information:

@FindBy(css = ".ui-page-panel ui-tabs-panel ui-widget-content ui-droppable")
public WebElement welTab;
@FindBy(xpath = "//li[text()='Send an Email']")
public WebElement welSendEmail;

@FindBy(xpath = "//div[@class='syn-receptor ui-droppable syn-receptor-north
ui-draggable syn-receptor-draggable']/parent::*//div[@id='module-1']")
public WebElement welSyncreceptor;
@FindBy(xpath = "//div[@class='syn-node ui-draggable syn-node-active']")
public WebElement welSyncnode;